Initial HTA71 impressions
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Evolving Member
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From: South Bend, IN
Initial HTA71 impressions
So after work on Friday night I set out to try and at least get the stock turbo out of the car so I could finish installing everything on Saturday prior to the start of college football (ND fan checking in...). I was very nervous about taking apart hot parts with nearly 80k on the clock that had not been separated since birth. Amber at FP turned me on to "Kroil" which is a penetrating lubricant touted to be superior to PB. I soaked everything on Wednesday night. I'm guessing it works pretty damn well, everything, including the O2 sensor came apart with little hesitation. Of course, a hefty 1/2 impact helps a lot...
I ended up not only getting everything apart, but also got everything back together the same night. I was thrilled. I hit a snag with my Injen piping/intake though, I didn't realize the BOV was in a different spot than stock so my thoughts of upgrading to the FP intake were crushed. I was able to make the injen pipe work with a few razor blades and some coupler magic, so that was good.
Everything fired right up, no leaks. I left boost exactly where it was prior to installing everything and took it out for a run. Here's the mod list:
ETS 3.5 wide FMIC
Megan 3" TBE
GM 3 port at 22, tapering to 18-19
Tephra V7, self-tuned at this point
Jay Racing 340 pump
680 injectors
Injen UICP/LICP and intake
I added:
HTA71 with 84mm FP Flow Advancement cover
TiTek O2 housing (bought used, was not on the car prior to the turbo upgrade)
I made a run on the stock setup on Wednesday just to get a baseline. VD reported 318 awhp, I forget how much torque. I was getting little blips of knock (3-4 counts) so that's why I lowered the boost a little.
With the HTA71 in place I set out for a baseline. Much to my shagrin, I came back with the exact same number - 318 and something like 268 tq. I should have expected that, it's not like the HTA71 is a huge step up from the stock IX turbo after all. The sound was incredible though, it sounds like a flippin' jet engine now.
Undeterred, I checked over the logs and noticed I had absolutely no knock anywhere. Cool, that tells me it must be a tad bit more efficient at the same boost level, at least I think so anyway. AFRs were 11.0:1 perfectly flat across the board. So - add more boost!
I have it now with a spike to 24 psi, settling down to around 21 and added a degree of timing everywhere after 4500 RPM. The results so far - 348 awhp, 330 tq (if memory serves). I plugged in a few percent more WGDC and reduced the area of the spike but haven't relogged it yet. I will hopefully get another VD run in this weekend.
When all is said and done, I'm happy with the upgrade. It's not a substantial jump up but it's a good stepping stone for the car I think. It may get swapped out for something bigger down the line, but first I'm going to get a new clutch and then a tune from Devin at Boostin Performance. Next year it will get cams/springs and ID1000s/FIC1150 Hi-Zs and an E85 tune as well.
Hope you enjoyed the writeup, let me know if anyone has any questions and thanks to FP for a great product. I truly feel it was well worth the time and the $650.
I ended up not only getting everything apart, but also got everything back together the same night. I was thrilled. I hit a snag with my Injen piping/intake though, I didn't realize the BOV was in a different spot than stock so my thoughts of upgrading to the FP intake were crushed. I was able to make the injen pipe work with a few razor blades and some coupler magic, so that was good.
Everything fired right up, no leaks. I left boost exactly where it was prior to installing everything and took it out for a run. Here's the mod list:
ETS 3.5 wide FMIC
Megan 3" TBE
GM 3 port at 22, tapering to 18-19
Tephra V7, self-tuned at this point
Jay Racing 340 pump
680 injectors
Injen UICP/LICP and intake
I added:
HTA71 with 84mm FP Flow Advancement cover
TiTek O2 housing (bought used, was not on the car prior to the turbo upgrade)
I made a run on the stock setup on Wednesday just to get a baseline. VD reported 318 awhp, I forget how much torque. I was getting little blips of knock (3-4 counts) so that's why I lowered the boost a little.
With the HTA71 in place I set out for a baseline. Much to my shagrin, I came back with the exact same number - 318 and something like 268 tq. I should have expected that, it's not like the HTA71 is a huge step up from the stock IX turbo after all. The sound was incredible though, it sounds like a flippin' jet engine now.
Undeterred, I checked over the logs and noticed I had absolutely no knock anywhere. Cool, that tells me it must be a tad bit more efficient at the same boost level, at least I think so anyway. AFRs were 11.0:1 perfectly flat across the board. So - add more boost!
I have it now with a spike to 24 psi, settling down to around 21 and added a degree of timing everywhere after 4500 RPM. The results so far - 348 awhp, 330 tq (if memory serves). I plugged in a few percent more WGDC and reduced the area of the spike but haven't relogged it yet. I will hopefully get another VD run in this weekend.
When all is said and done, I'm happy with the upgrade. It's not a substantial jump up but it's a good stepping stone for the car I think. It may get swapped out for something bigger down the line, but first I'm going to get a new clutch and then a tune from Devin at Boostin Performance. Next year it will get cams/springs and ID1000s/FIC1150 Hi-Zs and an E85 tune as well.
Hope you enjoyed the writeup, let me know if anyone has any questions and thanks to FP for a great product. I truly feel it was well worth the time and the $650.
Thread Starter
Evolving Member
iTrader: (6)
Joined: Aug 2009
Posts: 347
Likes: 3
From: South Bend, IN
Maybe I should have gone green but no bigger than that for my purposes/goals (400 awhp on pump). Does PTE make anything comparable? For a DD, i can't imagine these cars being much fun in normal circumstances with a 35r or something along those lines. Sure they make great peak power but based on dyno charts, the usable midrange kinda sucks.
I don't know. I was thinking 71 for a while, but now I'm thinking 5858 or 6262. I really don't know what to go with and your review is kind of iffy, better than the 9 turbo but your already thinking bigger in the future. I want to pick one turbo and stick with it, if that's possible.
Thread Starter
Evolving Member
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Joined: Aug 2009
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From: South Bend, IN
Just know your goals and stick to them. At 400 awhp, i know the ix can do it on pump but I'll be stressing it more than I want. I do not want to compromise the 6 speed or have to endure a heavy or twin clutch on a DD so those things drive my decisions. The biggest I would go is a dbb green relative to how I use my car.
I hope to see results soon, at this moment the HTA71 is the only turbo I would consider using as I have no desire to have top end power unlike everyone else on this site.
The 71mm is a fun street turbo if it's tuned right and have a proper combo.It spools faster then a stock 9 turbo and better top end.For the money it's awesome and cheap.
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it wont spool faster then the 9 turbo because its bigger then the 9 turbo.
heres a decent result on a 71hta i did. https://www.evolutionm.net/forums/ev...5-powered.html
theres a video of him beating a 500WHP~ z06 as well. google tscompusa hta71
this cars on e85 though.. but the 71hta does ok on 93 as well with proper good bolt ons.
Todd.. get a good set of cams asap.. they work wonders in the evo!
this turbo will easily do over 400whp on 93 also as long as you have the right bolt ons.. very easily. this turbos like a mini hta green.
---------
the only way to see spoolup speed is if the cars properly loaded around 2000rpm then hammered.. i dont even try this stuff on stock blocks, its not worth the stress on the rods to see where the turbo spools up at.
Robert @ FP had or still might have this thing on his personal evo.. it does spool insane thats for sure when you load it up.
heres a decent result on a 71hta i did. https://www.evolutionm.net/forums/ev...5-powered.html
theres a video of him beating a 500WHP~ z06 as well. google tscompusa hta71
this cars on e85 though.. but the 71hta does ok on 93 as well with proper good bolt ons.
Todd.. get a good set of cams asap.. they work wonders in the evo!
this turbo will easily do over 400whp on 93 also as long as you have the right bolt ons.. very easily. this turbos like a mini hta green.
---------
the only way to see spoolup speed is if the cars properly loaded around 2000rpm then hammered.. i dont even try this stuff on stock blocks, its not worth the stress on the rods to see where the turbo spools up at.
Robert @ FP had or still might have this thing on his personal evo.. it does spool insane thats for sure when you load it up.
Thread Starter
Evolving Member
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Joined: Aug 2009
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From: South Bend, IN
Thanks guys. Keep in mind I am tuning it myself so take my result with a grain of salt.
Tscomp, cams are on the to do list but not in the budget quite yet. Sadly I know I can install cams just fine myself but I am a bit nervous about doing the valvetrain myself.
Tscomp, cams are on the to do list but not in the budget quite yet. Sadly I know I can install cams just fine myself but I am a bit nervous about doing the valvetrain myself.
however.. it is extremely easy to do. if you can install cams you can do it! you just need the special tool to compress the springs..
http://www.euroexportinc.com/store/t...ompressor.html
btw if you need cams let me know ill sell to you very cheap.

also im about to remove kelford 272 for gsc s3 in my personal car.
things that are mandatory to your evo to making max pwoer:
3" TBE
Good FMIC
Good Cams
Port the intake mani and exhaust mani
Non leaking good bov
hard ic pipes for better flow
nice pump and set of injectors
you already have good boost control
id encourage going speed density and going with a 4" intake pipe on a large K&N filter also for your next setup.
once you touch all those aspects you will make easy power as long as your engines healthy.
after all mods the car should still drive like it did stock or better.
you're on the right track though. hope my info helped some.
Thread Starter
Evolving Member
iTrader: (6)
Joined: Aug 2009
Posts: 347
Likes: 3
From: South Bend, IN
this might not be 100% good info to say, but ive had customers go 140mph in the 1/4 on stock valvetrain with kelford 272 cams.. so floating a valve is unlikely to occur but it is recommended to upgrade the springs & retainers when doing larger 272 cams..
however.. it is extremely easy to do. if you can install cams you can do it! you just need the special tool to compress the springs..
http://www.euroexportinc.com/store/t...ompressor.html
btw if you need cams let me know ill sell to you very cheap.
also im about to remove kelford 272 for gsc s3 in my personal car.
things that are mandatory to your evo to making max pwoer:
3" TBE
Good FMIC
Good Cams
Port the intake mani and exhaust mani
Non leaking good bov
hard ic pipes for better flow
nice pump and set of injectors
you already have good boost control
id encourage going speed density and going with a 4" intake pipe on a large K&N filter also for your next setup.
once you touch all those aspects you will make easy power as long as your engines healthy.
after all mods the car should still drive like it did stock or better.
you're on the right track though. hope my info helped some.
however.. it is extremely easy to do. if you can install cams you can do it! you just need the special tool to compress the springs..
http://www.euroexportinc.com/store/t...ompressor.html
btw if you need cams let me know ill sell to you very cheap.

also im about to remove kelford 272 for gsc s3 in my personal car.
things that are mandatory to your evo to making max pwoer:
3" TBE
Good FMIC
Good Cams
Port the intake mani and exhaust mani
Non leaking good bov
hard ic pipes for better flow
nice pump and set of injectors
you already have good boost control
id encourage going speed density and going with a 4" intake pipe on a large K&N filter also for your next setup.
once you touch all those aspects you will make easy power as long as your engines healthy.
after all mods the car should still drive like it did stock or better.
you're on the right track though. hope my info helped some.


